dt_bindings: rs485: Add receiver enable polarity

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Add polarity property for receiver enable. Some UARTs have separate
enable pins for tx (RTS or DE) and rx (RE). As most RS485 transceivers
have !RE pin, the default is active low in contrast to
rs485-rts-active-low that defaults to active high.

Cc: devicetree@vger.kernel.org
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220426122448.38997-4-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ilpo Järvinen 2022-04-26 15:24:41 +03:00 • committed by Greg Kroah-Hartman

parent 5ff33917fa

commit 103dcf2ea2

1 changed files with 5 additions and 0 deletions

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Documentation/devicetree/bindings/serial/rs485.yaml

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